(1) Until the date determined under subsection (2), the ninety-third district consists of the counties of Schoolcraft and Alger, is a district of the first class, and has 1 judge.

    (2) Beginning on the date on which a vacancy occurs in the office of district judge in the ninety-third district or the beginning date of the term for which the incumbent district judge in the ninety-third district no longer seeks election or reelection to that office, whichever is earlier, the ninety-third district consists of the counties of Schoolcraft and Alger and is a district of the first class. Under section 810a, the probate judge for the fifth probate district described in section 807 shall serve as judge of the ninety-third district.